Question

Is the airfoil with a sharp trailing edge move with a positive angle of attack?

(a) True

(b) False

The question was asked in final exam.

Origin of the question is The Kutta Condition in division Incompressible Flow over Airfoils of Aerodynamics

Answer 1

The correct choice is (a) True

The explanation: The airfoil with a sharp trailing edge begins to move with a positive angle of attack through air, the two stagnation points are initially located on the underside near the leading edge and on the topside near the trailing edge, just as with the cylinder, as the air passing the underside of the airfoil reaches the trailing edge, it must flow around the trailing edge on the top side of the airfoil.